If the withdrawal bleeding is particularly heavy and larger than the menstrual flow, it is recommended to give treatment to stop the bleeding, such as taking Yunnan Baiyao or intramuscular injection of Anluoxian, which will achieve a better therapeutic effect. Retreating bleeding is often caused by oral emergency contraceptive pills, and will occur 3-5 days after stopping the pills, and most of this retreating bleeding is relatively small, far less than the amount of menstruation. Another type of withdrawal bleeding is the clinical phenomenon of menopause, after the examination of no pregnancy, oral progesterone is given to promote menstruation, after stopping the drug is also called withdrawal bleeding, this withdrawal bleeding is often the same as the amount of menstruation. Regardless of the type of withdrawal bleeding, if it is greater than the amount of menstruation, it is an abnormal phenomenon, and the clinic should give appropriate intervention, and the bleeding will be significantly reduced after the intervention.